﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * Utility functions. (IE version).
 */

FCKTools.CancelEvent = function( e )
{
    return false ;
}

// Appends one or more CSS files to a document.
FCKTools._AppendStyleSheet = function( documentElement, cssFileUrl )
{
    return documentElement.createStyleSheet( cssFileUrl ).owningElement ;
}

// Appends a CSS style string to a document.
FCKTools.AppendStyleString = function( documentElement, cssStyles )
{
    if ( !cssStyles )
        return null ;

    var s = documentElement.createStyleSheet( "" ) ;
    s.cssText = cssStyles ;
    return s ;
}

// Removes all attributes and values from the element.
FCKTools.ClearElementAttributes = function( element )
{
    element.clearAttributes() ;
}

FCKTools.GetAllChildrenIds = function( parentElement )
{
    var aIds = new Array() ;
    for ( var i = 0 ; i < parentElement.all.length ; i++ )
    {
        var sId = parentElement.all[i].id ;
        if ( sId && sId.length > 0 )
            aIds[ aIds.length ] = sId ;
    }
    return aIds ;
}

FCKTools.RemoveOuterTags = function( e )
{
    e.insertAdjacentHTML( 'beforeBegin', e.innerHTML ) ;
    e.parentNode.removeChild( e ) ;
}

FCKTools.CreateXmlObject = function( object )
{
    var aObjs ;

    switch ( object )
    {
        case 'XmlHttp' :
            // Try the native XMLHttpRequest introduced with IE7.
            if ( document.location.protocol != 'file:' )
                try { return new XMLHttpRequest() ; } catch (e) {}

            aObjs = [ 'MSXML2.XmlHttp', 'Microsoft.XmlHttp' ] ;
            break ;

        case 'DOMDocument' :
            aObjs = [ 'MSXML2.DOMDocument', 'Microsoft.XmlDom' ] ;
            break ;
    }

    for ( var i = 0 ; i < 2 ; i++ )
    {
        try { return new ActiveXObject( aObjs[i] ) ; }
        catch (e)
        {}
    }

    if ( FCKLang.NoActiveX )
    {
        alert( FCKLang.NoActiveX ) ;
        FCKLang.NoActiveX = null ;
    }
    return null ;
}

FCKTools.DisableSelection = function( element )
{
    element.unselectable = 'on' ;

    var e, i = 0 ;
    // The extra () is to avoid a warning with strict error checking. This is ok.
    while ( (e = element.all[ i++ ]) )
    {
        switch ( e.tagName )
        {
            case 'IFRAME' :
            case 'TEXTAREA' :
            case 'INPUT' :
            case 'SELECT' :
                /* Ignore the above tags */
                break ;
            default :
                e.unselectable = 'on' ;
        }
    }
}

FCKTools.GetScrollPosition = function( relativeWindow )
{
    var oDoc = relativeWindow.document ;

    // Try with the doc element.
    var oPos = { X : oDoc.documentElement.scrollLeft, Y : oDoc.documentElement.scrollTop } ;

    if ( oPos.X > 0 || oPos.Y > 0 )
        return oPos ;

    // If no scroll, try with the body.
    return { X : oDoc.body.scrollLeft, Y : oDoc.body.scrollTop } ;
}

FCKTools.AddEventListener = function( sourceObject, eventName, listener )
{
    sourceObject.attachEvent( 'on' + eventName, listener ) ;
}

FCKTools.RemoveEventListener = function( sourceObject, eventName, listener )
{
    sourceObject.detachEvent( 'on' + eventName, listener ) ;
}

// Listeners attached with this function cannot be detached.
FCKTools.AddEventListenerEx = function( sourceObject, eventName, listener, paramsArray )
{
    // Ok... this is a closures party, but is the only way to make it clean of memory leaks.
    var o = new Object() ;
    o.Source = sourceObject ;
    o.Params = paramsArray || [] ;    // Memory leak if we have DOM objects here.
    o.Listener = function( ev )
    {
        return listener.apply( o.Source, [ ev ].concat( o.Params ) ) ;
    }

    if ( FCK.IECleanup )
        FCK.IECleanup.AddItem( null, function() { o.Source = null ; o.Params = null ; } ) ;

    sourceObject.attachEvent( 'on' + eventName, o.Listener ) ;

    sourceObject = null ;    // Memory leak cleaner (because of the above closure).
    paramsArray = null ;    // Memory leak cleaner (because of the above closure).
}

// Returns and object with the "Width" and "Height" properties.
FCKTools.GetViewPaneSize = function( win )
{
    var oSizeSource ;

    var oDoc = win.document.documentElement ;
    if ( oDoc && oDoc.clientWidth )                // IE6 Strict Mode
        oSizeSource = oDoc ;
    else
        oSizeSource = win.document.body ;        // Other IEs

    if ( oSizeSource )
        return { Width : oSizeSource.clientWidth, Height : oSizeSource.clientHeight } ;
    else
        return { Width : 0, Height : 0 } ;
}

FCKTools.SaveStyles = function( element )
{
    var data = FCKTools.ProtectFormStyles( element ) ;

    var oSavedStyles = new Object() ;

    if ( element.className.length > 0 )
    {
        oSavedStyles.Class = element.className ;
        element.className = '' ;
    }

    var sInlineStyle = element.style.cssText ;

    if ( sInlineStyle.length > 0 )
    {
        oSavedStyles.Inline = sInlineStyle ;
        element.style.cssText = '' ;
    }

    FCKTools.RestoreFormStyles( element, data ) ;
    return oSavedStyles ;
}

FCKTools.RestoreStyles = function( element, savedStyles )
{
    var data = FCKTools.ProtectFormStyles( element ) ;
    element.className        = savedStyles.Class || '' ;
    element.style.cssText    = savedStyles.Inline || '' ;
    FCKTools.RestoreFormStyles( element, data ) ;
}

FCKTools.RegisterDollarFunction = function( targetWindow )
{
    targetWindow.$ = targetWindow.document.getElementById ;
}

FCKTools.AppendElement = function( target, elementName )
{
    return target.appendChild( this.GetElementDocument( target ).createElement( elementName ) ) ;
}

// This function may be used by Regex replacements.
FCKTools.ToLowerCase = function( strValue )
{
    return strValue.toLowerCase() ;
}
